Gas chromatography apparatus

Abstract

A gas chromatograph is provided that allows for the preset setting of a maintenance mode, and subsequent maintenance of components can be performed through simple operations on the main body of the apparatus. The gas chromatograph includes a communication unit, a setting processing unit, a first operation receiving unit, and a maintenance processing unit. The communication unit communicates with an external source. The setting processing unit sets one of multiple maintenance modes as the default maintenance mode based on input from the external source via the communication unit. The first operation receiving unit is disposed in the housing and receives progress operations for advancing a maintenance sequence corresponding to the default maintenance mode. Whenever a progress operation is received by the first operation receiving unit, the maintenance processing unit advances the maintenance sequence in stages. The first operation receiving unit is used consistently regardless of which of the multiple maintenance modes is set as the default maintenance mode.

Description

Technical Field

[0001] This invention relates to a gas chromatography apparatus capable of setting multiple maintenance modes. Background Technology

[0002] For example, the gas chromatography apparatus disclosed in Patent Document 1 below has a mode that automatically cools the column for column replacement, which serves as an example of a maintenance mode. The gas chromatography apparatus includes a device that allows selection and execution of one of multiple maintenance modes through operation of an information processing terminal connected to the gas chromatography apparatus via a network.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 10-48190 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] Maintaining a gas chromatography apparatus requires multiple procedures, including operating the information processing terminal and replacing components of the gas chromatography apparatus. Specifically, operating the information processing terminal involves manipulating the maintenance screen, which is displayed on the terminal and used to perform these procedures.

[0008] Maintaining this gas chromatography device requires personnel to travel back and forth between the information processing terminal and the gas chromatography device, which takes considerable time.

[0009] Therefore, it was also considered to connect a portable information processing terminal directly to the gas chromatograph, allowing maintenance to be performed while operating the maintenance screen displayed on the information processing terminal near the gas chromatograph. However, changes to maintenance modes are relatively rare, and connecting the information processing terminal to the gas chromatograph every time maintenance is required is cumbersome.

[0010] The present invention was made in view of the above-mentioned actual situation, and its object is to provide a gas chromatography apparatus that can be preset with a maintenance mode and then perform maintenance on its components through simple operation of the main body of the apparatus.

[0011] Solution for solving the problem

[0012] The method of the present invention is a gas chromatography device capable of setting multiple maintenance modes for components provided in a housing, and includes a communication unit, a setting processing unit, a first operation receiving unit, and a maintenance processing unit. The communication unit communicates with the outside. The setting processing unit sets one of the multiple maintenance modes as the default maintenance mode according to an input from the outside via the communication unit. The first operation receiving unit is provided on the housing and receives a progress operation for advancing the maintenance sequence corresponding to the default maintenance mode. Whenever the progress operation is received by the first operation receiving unit, the maintenance processing unit advances the maintenance sequence step by step. The first operation receiving unit is commonly used regardless of which of the multiple maintenance modes is set as the default maintenance mode.

[0013] Effect of the Invention

[0014] According to the present invention, it is possible to preset the maintenance mode, and then perform maintenance of components through simple operations on the device main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram showing an example of the gas chromatography system of the present embodiment.

[0016] Figure 2 is a schematic cross-sectional view showing an example of the structure of the gas chromatography device of the present embodiment.

[0017] Figure 3 is a schematic cross-sectional view showing an example of the structure of the sample introduction unit of the present embodiment.

[0018] Figure 4 is a block diagram showing an example of the electrical structure of the gas chromatography device of the present embodiment.

[0019] Figure 5 is a functional block diagram showing a specific example of the electrical structure of the gas chromatography device of the present embodiment.

[0020] Figure 6 is a flowchart showing an example of the progress operation of the gas chromatography device of the present embodiment.

[0021] Figure 7 is a flowchart showing an example of the cancellation operation of the gas chromatography device of the present embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] 1. Peripheral Structure of the Gas Chromatography Device

[0023] Figure 1 is a block diagram showing an example of the gas chromatography system 10 of the present embodiment. As Figure 1As shown, the gas chromatography system 10 includes a gas chromatography apparatus 12 and a user terminal 14.

[0024] The gas chromatograph 12 is a device used to separate the components contained in a gas sample (sample gas) according to different components and to detect various components as needed.

[0025] User terminal 14 is a device that has at least a CPU, a communication unit for communicating with the outside world, and non-volatile memory, and is a desktop PC, laptop PC, smartphone, or tablet PC, etc.

[0026] The gas chromatograph apparatus 12 and the user terminal 14 are connected via a network 16 such as a LAN (Local Area Network), WAN (Wide Area Network), or the Internet. Alternatively, the gas chromatograph apparatus 12 and the user terminal 14 can also be directly connected via wired or wireless means to enable communication.

[0027] In addition, the gas chromatography system 10, specifically the gas chromatography apparatus 12, is sometimes directly connected to the setting terminal 18 via wired or wireless means to enable communication. The setting terminal 18 is the same device as the user terminal 14, used to set settings related to the gas chromatography apparatus 12.

[0028] For example, when a technical service personnel maintains the gas chromatograph apparatus 12, the setup terminal 18 is connected to the gas chromatograph apparatus 12. Alternatively, the setup terminal 18 can also be connected to the gas chromatograph apparatus 12 via a predefined network.

[0029] 2. Structure of a gas chromatography apparatus

[0030] Figure 2 This is a schematic cross-sectional view showing an example of the structure of the gas chromatograph apparatus 12 according to this embodiment. The gas chromatograph apparatus 12 includes a column oven 22, a sample introduction section 24, a column 26, and a detector 28, which are disposed within a housing 20. Specifically, the sample introduction section 24, the column 26, and the detector 28 are disposed within the column oven 22.

[0031] The sample introduction section 24 is a sample introduction unit (SPL) for introducing carrier gas and sample gas into the column 26. A sample, which can be either a liquid or a gas, is supplied to the sample introduction section 24. That is, a liquid sample or a sample gas is supplied to the sample introduction section 24. When a liquid sample is supplied to the sample introduction section 24, the liquid sample is vaporized and introduced into the column 26 as a sample gas.

[0032] Furthermore, the gas supply path 30 and the diversion path 32 are connected to the sample inlet 24. The gas supply path 30 is a path for supplying carrier gas into the sample inlet 24. In addition, a valve 34 that can be electrically controlled is provided on the gas supply path 30, so that the supply of carrier gas can be stopped appropriately.

[0033] The split flow path 32 is a flow path used to discharge a portion of the gas (mixture of carrier gas and sample gas) in the sample inlet 24 to the outside at a specified split ratio when the carrier gas and sample gas are introduced into the column 26 by the split introduction method.

[0034] Detector 28 is configured to sequentially detect the various components separated by column 26. Detector 28 is, for example, a flame ionization detector (FID).

[0035] Additionally, an opening / closing mechanism 40 is provided outside the column temperature chamber 22 for opening and closing the air supply port 36 and the exhaust port 38. The opening / closing mechanism 40 includes an air supply baffle 42 for opening and closing the air supply port 36 and an exhaust baffle 44 for opening and closing the exhaust port 38. A fan 46, a heater 48, and a temperature sensor 50 are also provided inside the column temperature chamber 22.

[0036] When heating is performed inside the column oven 22, the air supply baffle 42 and the exhaust baffle 44 are closed, and the fan 46 rotates and the heater 48 generates heat. The air heated by the heater 48 circulates inside the column oven 22, thus heating the interior of the column oven 22. Simultaneously, the sample inlet 24, the column 26, and the detector 28 are also heated.

[0037] During cooling of the column oven 22, the air supply baffle 42 and the exhaust baffle 44 are open, and the fan 46 rotates. Air entering from the air supply port 36 circulates within the column oven 22 and is exhausted from the exhaust port 38, thereby cooling the column oven 22. Simultaneously, the sample inlet 24, the column 26, and the detector 28 are also cooled.

[0038] Temperature sensor 50 is a general-purpose temperature sensor designed to monitor the temperature inside column oven 22.

[0039] Furthermore, in this embodiment, a first operation receiving part 52, a second operation receiving part 54, and a notification part 56 are provided on the housing 20 of the gas chromatograph apparatus 12, specifically on the outside of the housing 20.

[0040] The first operation receiving unit 52 is provided for receiving prescribed operations related to the maintenance of the gas chromatograph apparatus 12. The first operation receiving unit 52 is not particularly limited to functioning as a button.

[0041] The first operation receiving unit 52 can be, for example, a mechanical button, a pressure-sensitive button, or an electrostatic capacitive button. Alternatively, a touch panel display showing buttons reproduced in software can also be used as the first operation receiving unit 52.

[0042] Similar to the first operation receiving unit 52, the second operation receiving unit 54 is provided for receiving prescribed operations related to the maintenance of the gas chromatograph apparatus 12, and is not particularly limited as long as it functions as a button.

[0043] The notification unit 56 is provided to notify the gas chromatograph apparatus 12 of the maintenance progress. When notifying the gas chromatograph apparatus 12 of the maintenance progress in a visual manner, the notification unit 56 can use a light-emitting component such as an LED (light-emitting diode) or a display.

[0044] Furthermore, when notifying the gas chromatograph 12 of its maintenance progress audibly, a speaker or other sound-emitting component can be used as the notification unit 56. In this case, the notification unit 56 can also be housed within the housing 20. Moreover, the notification unit 56 is not particularly limited as long as it can be used to notify the gas chromatograph 12 of its maintenance progress.

[0045] Figure 3 This is a schematic cross-sectional view showing an example of the structure of the sample introduction section 24 in this embodiment. The main body 60 of the sample introduction section 24 is formed hollow, thus forming a sample vaporization chamber 62 inside. Figure 3 In the example shown, the main body 60 is divided into a first main body 60a and a second main body 60b.

[0046] Gas supply path 30 connects to sample vaporization chamber 62 from first body 60a, and branch path 32 connects to sample vaporization chamber 62 from second body 60b. Inside body 60, glass insert 64, for example cylindrical in shape, is configured to be held by an annular sealing ring 66.

[0047] The first body 60a and the second body 60b are connected by fastening the sealing cap 68, into which the first body 60a is inserted, to the second body 60b. By removing the sealing cap 68, the sample vaporization chamber 62 is opened, thereby enabling the replacement of the insert 64, etc.

[0048] The column 26 is installed on the body 60 by fastening the column cap 70, into which the column 26 is inserted, to the end of the second body 60b opposite to the side of the first body 60a. When the column 26 is installed on the body 60, the column 26 is held in a state where it is disposed within the sample vaporization chamber 62, specifically within the insert 64.

[0049] This column cover 70 is also provided on the detector 28, and by removing the column cover 70, the column 26 and the detector 28 can be replaced.

[0050] The sample is supplied to the sample inlet 24 via needle 72. Needle 72 is inserted into diaphragm 74 through an opening in diaphragm cover 76. The needle 72 penetrates diaphragm 74, and the sample is supplied from the tip of the needle 72.

[0051] Furthermore, the pores formed in the diaphragm 74 during sample supply are blocked due to the elasticity of the diaphragm 74. Additionally, the diaphragm cover 76 is detachable from the main body 60, thus allowing the diaphragm 74 to be replaced by removing the diaphragm cover 76.

[0052] 3. Electrical structure of the gas chromatography apparatus

[0053] Figure 4 This is a block diagram showing an example of the electrical structure of the gas chromatograph apparatus 12 according to this embodiment. In addition to the detector 28 and valve 34, the gas chromatograph apparatus 12 also includes a communication unit 80 and a control unit 100.

[0054] In addition, the control unit 100, detector 28, valve 34, opening and closing mechanism 40, fan 46, heater 48, temperature sensor 50, first operation receiving unit 52, second operation receiving unit 54, notification unit 56 and communication unit 80 are each electrically connected to each other via a bus or other circuit 82.

[0055] The communication unit 80 includes a communication circuit for connecting to the communication module or network 16 via wired or wireless means. The communication unit 80 communicates directly with the outside or via the network 16 according to the instructions of the control unit 100.

[0056] Alternatively, the communication unit 80 may be able to communicate with an external storage medium. Examples of such external storage media include semiconductor media such as USB (Universal Serial Bus) memory or SD (Secure Digital) memory cards, and optical disc media such as CD (Compact Disc) or DVD (Digital Versatile Disc).

[0057] The control unit 100 is responsible for the overall control of the gas chromatography apparatus 12. The control unit 100 includes a CPU (Central Processing Unit) 102. In addition, the control unit 100 includes a RAM (Random Access Memory) 104 and a storage unit 106 that can be directly accessed by the CPU 102.

[0058] RAM 104 is used as the working area and buffer area of ​​CPU 102. Storage unit 106 is non-volatile memory, for example, HDD (Hard Disc Drive) or SSD (Solid State Drive) is used as storage unit 106.

[0059] The storage unit 106 stores control programs for controlling the gas chromatograph apparatus 12, as well as data (execution data) required for executing the control programs. Furthermore, the storage unit 106 may also include a RAM 104.

[0060] 4. Regarding maintenance mode

[0061] The gas chromatograph apparatus 12 of this embodiment can set multiple maintenance modes for the components provided in the housing 20. The components provided in the housing 20 specifically refer to the components (maintenance components) that are to be maintained, and examples of maintenance components include the sample inlet 24, the column 26, or the detector 28.

[0062] One of several maintenance modes is set as the default maintenance mode. The default maintenance mode is set based on external input. For example, the default maintenance mode is set by operating the setting terminal 18. The default maintenance mode is the maintenance mode that is set in advance before maintenance is performed.

[0063] Alternatively, the default maintenance mode can be set by operating the user terminal 14. Alternatively, when the communication unit 80 is connected to an external storage medium in a communicable manner, the default maintenance mode can be set by obtaining setting information from the external storage medium.

[0064] Each of the multiple maintenance modes has its own corresponding maintenance sequence. The maintenance sequence includes cooling procedures to cool the components being maintained and gas shut-off procedures to stop the supply of carrier gas. The progress or cancellation of the maintenance sequence corresponding to the default maintenance mode (default sequence) can be performed at any time.

[0065] In this embodiment, the first operation receiving unit 52 specifically receives progress operations. A progress operation is an operation used to advance the default sequence. Whenever the first operation receiving unit 52 receives a progress operation, the default sequence is advanced in stages.

[0066] The operation includes at least the action of bringing a finger close to the first operation receiving portion 52. For example, when using an electrostatic capacitive button or a touch panel display as the first operation receiving portion 52, the operation may only include the action of bringing a finger close to the first operation receiving portion 52, or it may also include the action of touching the first operation receiving portion 52 with a finger. In addition, when using a mechanical button or a pressure-sensitive button as the first operation receiving portion 52, the operation includes the action of bringing a finger close to the first operation receiving portion 52, the action of touching the first operation receiving portion 52 with a finger, and the action of pressing the first operation receiving portion 52 with a finger.

[0067] In this embodiment, the second operation receiving unit 54 specifically receives cancellation operations. A cancellation operation is an operation used to cancel the progress of a default sequence. Furthermore, the second operation receiving unit 54 has the same structure as the first operation receiving unit 52, and therefore can also perform cancellation operations using the same operation as the progress operation.

[0068] Regarding the first operation receiving unit 52, it is used in a common manner regardless of which of the multiple maintenance modes is set as the default maintenance mode. That is, multiple maintenance modes are not advanced by operating different first operation receiving units 52, but by operating a common first operation receiving unit 52. However, the number of stages of processing performed in the maintenance sequence corresponding to each maintenance mode may vary. Therefore, depending on the maintenance sequence set as the default sequence, the number of times the first operation receiving unit 52 is operated until the end of the default sequence may vary.

[0069] Furthermore, the notification unit 56 in this embodiment is specifically used to notify the progress status of the default sequence. The progress status of the default sequence is notified in a manner that allows for the identification of each of the multiple processes that are progressing in stages.

[0070] For example, if the progress of the default sequence is notified audibly, the notification unit 56 can either emit a sound corresponding to the progress status or issue an audio message. Alternatively, if the progress of the default sequence is notified visually, the notification unit 56 can emit light of a color corresponding to the progress status, change the light emission pattern of the notification unit 56 accordingly, or display a message corresponding to the progress status on the notification unit 56.

[0071] Multiple maintenance modes include a maintenance mode in which the supply of carrier gas is stopped upon receiving a progress operation from the first operation receiving unit 52 (manual stop mode) and a maintenance mode in which the supply of carrier gas is automatically stopped when the first operation receiving unit 52 does not receive a progress operation (automatic stop mode). Below, we will illustrate a series of procedures using the case where the manual stop mode is set as the default maintenance mode as an example.

[0072] When the first operation receiving unit 52 receives a progress operation and starts the default sequence, a cooling process is performed to cool the maintenance components. In this embodiment, when the cooling process is performed, the opening and closing mechanism 40 and the fan 46 are appropriately controlled to cool the sample introduction unit 24, the column 26, and the detector 28.

[0073] When the maintenance component has finished cooling, the notification unit 56 notifies the user that the next steps can proceed. The completion of cooling is determined based on the temperature detected by the temperature sensor 50. Furthermore, the cooling method for the maintenance component is not particularly limited. Additionally, the method for determining whether the cooling of the maintenance component is complete is not particularly limited.

[0074] When the first operation receiving unit 52 receives a subsequent progress operation, a gas stop procedure is executed. In this embodiment, when the gas stop procedure is executed, valve 34 switches from the open state to the closed state to stop the supply of carrier gas. At the same time, the notification unit 56 notifies that the maintenance component can be replaced. Furthermore, the replacement of the maintenance component refers to the replacement of the maintenance component itself and the replacement of components that make up part of the maintenance component.

[0075] When the replacement of the maintenance component is completed and the first operation receiving unit 52 receives the next progress operation, the default sequence ends and the gas chromatograph 12 returns to the state before the default sequence started.

[0076] The maintenance sequence corresponding to the automatic stop mode is the same as the maintenance sequence corresponding to the manual stop mode, except for a few processing steps. As a difference from the manual stop mode, when the automatic stop mode is set as the default maintenance mode, when the default sequence starts, after the cooling process is performed, the first operation receiving unit 52 performs the gas stop process if it does not receive a progress operation.

[0077] In this embodiment, when a cancellation operation is received by the second operation receiving unit 54 during the progress of the default sequence, the progress of the default sequence is cancelled, and the gas chromatograph 12 returns to the state before the default sequence started.

[0078] Therefore, in this embodiment, when a cancellation operation is received by the second operation receiving unit 54 during the progress of the default sequence, the progress of the default sequence is cancelled. Then, when a progress operation is received by the first operation receiving unit 52, the default sequence is restarted from the beginning. However, when a cancellation operation is received by the second operation receiving unit 54 after the cooling process has been performed, the cancellation operation is set to invalid.

[0079] Alternatively, in this embodiment, the presence or absence of gas leakage can also be determined in response to the end of the default sequence. When the default sequence ends, valve 34 switches from the closed state to the open state, begins supplying carrier gas, and determines whether or not there is a gas leak. A pressure sensor (not shown) is used to determine whether or not there is a gas leak, but the method of determination is not particularly limited.

[0080] If a gas leak is detected, the default sequence begins midway. If the manual stop mode is set to the default maintenance mode, the default sequence begins immediately after cooling treatment and before gas stop treatment, and gas stop treatment is performed by receiving a progress operation from the first operation receiving unit 52. If the automatic stop mode is set to the default maintenance mode, the default sequence begins immediately after gas stop treatment. Additionally, if a gas leak is detected, notification can also be sent via the notification unit 56.

[0081] Furthermore, in this embodiment, only one first operation receiving portion 52 is provided in the housing 20 of the gas chromatograph 12 as an example, but multiple first operation receiving portions 52 may also be provided. If multiple first operation receiving portions 52 are provided in the housing 20 of the gas chromatograph 12, each first operation receiving portion 52 receives progress operations at different time intervals.

[0082] Furthermore, in this embodiment, when using a detector requiring decompression, such as a mass spectrometer, as detector 28, it is preferable that the carrier gas supply be stopped for a short period of time in order to suppress adverse effects caused by the interruption of the carrier gas supply. Therefore, in such a case, it is preferable to set a manual stop mode that allows the carrier gas supply to be stopped just before the replacement of maintenance components as the default maintenance mode.

[0083] Furthermore, in this embodiment, if the maintenance component has already been cooled by external air or the like at the start of the default sequence, the cooling process can be omitted. The determination of whether the maintenance component has been cooled is based on the temperature detected by the temperature sensor 50. Moreover, the method for determining whether the cooling of the maintenance component is complete is not particularly limited.

[0084] Furthermore, the gas chromatography apparatus 12 of this embodiment can be connected to a mass spectrometer (not shown), thereby enabling the introduction of various components separated by the column 26 into the mass spectrometer.

[0085] Both the gas chromatograph 12 and the mass spectrometer described above are equipped with connectors for electrical interconnection. Therefore, the gas chromatograph 12 can determine whether a mass spectrometer is connected based on the presence or absence of a signal via the connector.

[0086] Therefore, it is also possible to set the manual stop mode as the default maintenance mode when the gas chromatograph 12 is connected to the mass spectrometer, and to set the automatic stop mode as the default maintenance mode when the gas chromatograph 12 is separated from the mass spectrometer.

[0087] In addition, in this embodiment, the progress of the default sequence or the cancellation of the progress of the default sequence can also be performed on the software installed on the user terminal 14.

[0088] 5. Specific examples of the electrical structure of a gas chromatography apparatus

[0089] Figure 5 This is a functional block diagram illustrating a specific example of the electrical structure of the gas chromatograph apparatus 12 according to this embodiment. Furthermore, in Figure 5 Illustrations of RAM104, etc., are omitted.

[0090] The storage unit 106 stores setting data 108, sequence data 110, and notification data 112, etc. Setting data 108 represents settings for items related to the gas chromatograph apparatus 12. Setting data 108 includes at least settings representing the default maintenance mode.

[0091] Sequence data 110 represents the maintenance sequence corresponding to the maintenance mode. The gas chromatograph apparatus 12 of this embodiment can set multiple maintenance modes, therefore multiple sequence data 110s are stored in the storage unit 106. However, it is also possible not to store multiple sequence data 110s in the storage unit 106, but instead to store the maintenance sequence corresponding to the default maintenance mode selected from the multiple maintenance modes in the storage unit 106.

[0092] Notification data 112 is data used when notifying the progress of the default sequence. Notification data 112 may include, for example, sound data, data indicating the illumination mode of a light, or data indicating a message.

[0093] Control unit 100 via CPU 102 (refer to) Figure 4 It executes programs and functions as a setting processing unit 114, a maintenance processing unit 116, and a notification processing unit 118.

[0094] The setting processing unit 114 sets one of the multiple maintenance modes as the default maintenance mode based on input from the outside via the communication unit 80.

[0095] Whenever a progress operation is received by the first operation receiving unit 52, the maintenance processing unit 116 causes the default sequence to progress in stages.

[0096] In addition, when a cancellation operation is received by the second operation receiving unit 54 during the progress of the default sequence, the maintenance processing unit 116 cancels the progress of the default sequence. When a progress operation is subsequently received by the first operation receiving unit 52, the maintenance processing unit 116 makes the default sequence start from the beginning.

[0097] Furthermore, when a cancellation operation is received by the second operation receiving unit 54 after the cooling process, the maintenance processing unit 116 invalidates the cancellation operation.

[0098] In addition, the maintenance and handling unit 116 controls the valve 34, the opening and closing mechanism 40, the fan 46, and the heater 48 as cooling and gas stopping processes are performed.

[0099] The notification processing unit 118 uses the notification unit 56 to notify the progress of the default sequence.

[0100] 6. Process

[0101] Figure 6 This is a flowchart illustrating an example of the progress operation of the gas chromatograph apparatus 12 according to this embodiment. The progress operation here refers to the operation of the gas chromatograph apparatus 12 related to the progress of the default sequence. Furthermore, Figure 6 The progress of the gas chromatograph 12 is shown when the manual stop mode is set to the default maintenance mode.

[0102] When the first operation receiving unit 52 receives a progress operation, the progress operation begins, and in step S1, a cooling process is performed. In step S2, the notification unit 56 notifies the user that the next progress operation can be accepted.

[0103] In step S3, it is determined whether a progress operation has been received by the first operation receiving unit 52. If the result in step S3 is "no," meaning that the first operation receiving unit 52 has not received a progress operation, the process returns to step S2 and continues to notify via the notification unit 56. On the other hand, if the result in step S2 is "yes," meaning that the first operation receiving unit 52 has received a progress operation, a gas stop process is performed in step S4, and the process proceeds to step S5.

[0104] In step S5, the notification unit 56 notifies that the maintenance component can be replaced, and then proceeds to step S6.

[0105] In step S6, it is determined whether a progress operation has been received by the first operation receiving unit 52. If the result in step S6 is "no," meaning that the first operation receiving unit 52 has not received a progress operation, the process returns to step S5, and notification continues through the notification unit 56. On the other hand, if the result in step S6 is "yes," meaning that the first operation receiving unit 52 has received a progress operation, the progress operation ends.

[0106] In addition, if the automatic stop mode is set as the default maintenance mode, steps S2 and S3 are omitted.

[0107] Figure 7 This is a flowchart illustrating an example of the cancellation operation of the gas chromatograph apparatus 12 according to this embodiment. The cancellation operation here refers to the operation of the gas chromatograph apparatus 12 related to the cancellation of the progress of the default sequence.

[0108] During the progress of the default sequence, in step S10, it is determined whether a cancellation operation has been received by the second operation receiving unit 54. If the result in step S10 is "no," meaning that the second operation receiving unit 54 has not received a cancellation operation, then the process proceeds to step S14. On the other hand, if the result in step S10 is "yes," meaning that the second operation receiving unit 54 has received a cancellation operation, then the process proceeds to step S11.

[0109] In step S11, it is determined whether the process is before cooling. If the result in step S11 is "No," meaning after cooling, then proceed to step S13. On the other hand, if the result in step S11 is "Yes," meaning before cooling, then proceed to step S12.

[0110] In step S12, the progress of the default sequence is canceled. That is, as... Figure 6 The progress of the process shown is cancelled. The cancellation action ends when the progress of the default sequence is cancelled in step S12.

[0111] In step S13, the cancellation operation is invalidated. In step S14, it is determined whether the default sequence has ended. If the result in step S14 is "No," meaning the default sequence has not ended, the process returns to step S10. On the other hand, if the result in step S14 is "Yes," meaning the default sequence has ended, the cancellation action ends.

[0112] Furthermore, the specific structure listed in this embodiment is just one example and can be appropriately modified according to the actual product. Also, if each step in the flowchart shown in this embodiment yields the same result, the processing order can be appropriately changed.

[0113] 7. Method

[0114] Those skilled in the art will understand that the above-described exemplary embodiments are specific examples of the following approaches.

[0115] (First item) A gas chromatograph apparatus according to one method is capable of setting multiple maintenance modes for components disposed in the housing, and the gas chromatograph apparatus may also include:

[0116] The communications department is responsible for communicating with external parties.

[0117] The setting processing unit sets one of the plurality of maintenance modes as the default maintenance mode based on input from the outside via the communication unit;

[0118] A first operation receiving unit, disposed in the housing, receives a progress operation for advancing a maintenance sequence corresponding to the default maintenance mode; and

[0119] The maintenance processing unit, whenever the first operation receiving unit receives the progress operation, causes the maintenance sequence to progress in stages.

[0120] The first operation receiving unit is used in a common manner regardless of which of the plurality of maintenance modes is set as the default maintenance mode.

[0121] According to the gas chromatograph apparatus described in the first item, one of multiple maintenance modes can be preset as the default maintenance mode. Furthermore, after setting the maintenance mode, by using the progression operation of the first operation receiving unit, which is commonly used in multiple maintenance modes, the maintenance sequence can be progressively advanced, thus enabling component maintenance through simple operations on the apparatus body.

[0122] (Second item) In the gas chromatography apparatus described in the first item, it may also be,

[0123] It also includes a notification processing unit, which is used to notify the progress status of the maintenance sequence.

[0124] According to the gas chromatography apparatus described in the second item, component maintenance can be reliably performed while confirming the progress of the maintenance sequence based on notifications.

[0125] (Third item) In the gas chromatography apparatus described in the first or second item, it may also be,

[0126] The plurality of maintenance modes include a maintenance mode in which the gas supply is stopped upon receiving the progress operation by the first operation receiving unit, and a maintenance mode in which the gas supply is automatically stopped if the first operation receiving unit does not receive the progress operation.

[0127] According to the gas chromatography apparatus described in the third item, when maintaining the components of the gas chromatography apparatus, the supply of carrier gas is stopped manually or automatically according to the maintenance mode set as the default maintenance mode. Therefore, by selecting the maintenance mode based on the characteristics of the components constituting the gas chromatography apparatus and the devices connected to the gas chromatography apparatus, the optimal maintenance mode can be set as the default maintenance mode.

[0128] (Fourth item) In any of the gas chromatography apparatus described in items one through three, it may also be,

[0129] Only one of the first operation receiving parts is provided in the housing.

[0130] According to the gas chromatography apparatus described in the fourth item, maintenance sequences can be performed through progressive operations targeting a first operation receiving unit, thus enabling component maintenance through simpler operations targeting the apparatus body. Furthermore, based on this, even personnel unfamiliar with the maintenance of gas chromatography apparatuses can easily perform maintenance sequences.

[0131] (Fifth item) In any of the gas chromatography apparatus described in items one through four, it may also be,

[0132] It also includes a second operation receiving unit disposed in the housing, which accepts a cancellation operation for canceling the progress of the maintenance sequence.

[0133] According to the gas chromatograph apparatus described in the fifth item, the second operation receiving unit can be operated as needed, thereby canceling the progress of the maintenance sequence.

[0134] (Sixth) In the gas chromatography apparatus described in the fifth item, it may also be,

[0135] When the cancellation operation is received by the second operation receiving unit during the progress of the maintenance sequence, the maintenance processing unit cancels the progress of the maintenance sequence. When the progress operation is subsequently received by the first operation receiving unit, the maintenance processing unit causes the maintenance sequence to start from the beginning.

[0136] According to the gas chromatograph apparatus described in item 6, it is possible to restart the maintenance sequence from scratch after the progress of the maintenance sequence has been cancelled.

[0137] (Seventh) In the gas chromatography apparatus described in the sixth item, it may also be,

[0138] The maintenance sequence includes a cooling process to cool the component.

[0139] When the cancellation operation is received by the second operation receiving unit after the cooling process, the maintenance processing unit invalidates the cancellation operation.

[0140] According to the gas chromatograph apparatus described in item seven, it is possible to prevent the maintenance sequence from being erroneously cancelled after the cooling process has been performed. In other words, it is possible to prevent the cooling process from being repeated due to the erroneous cancellation of the maintenance sequence.

[0141] (Eighth item) In any of the gas chromatography apparatus described in items one through seven, it may also be,

[0142] The component is a sample inlet, a column, or a detector.

[0143] According to the gas chromatography apparatus described in item 8, the sample inlet, detector, or column can be maintained through simple operations on the main body of the apparatus.

[0144] Explanation of reference numerals in the attached figures

[0145] 12: Gas chromatograph apparatus; 20: Housing; 24: Sample introduction unit; 26: Column; 28: Detector; 52: First operation receiving unit; 54: Second operation receiving unit; 80: Communication unit; 114: Setting processing unit; 116: Maintenance processing unit; 118: Notification processing unit.

Claims

1. A gas chromatograph apparatus capable of setting multiple maintenance modes for components disposed in a housing, the gas chromatograph apparatus comprising: The communications department is responsible for communicating with external parties. The setting processing unit sets one of the plurality of maintenance modes as the default maintenance mode based on input from the outside via the communication unit; A first operation receiving unit is disposed in the housing and receives a progress operation for advancing the maintenance sequence corresponding to the default maintenance mode; as well as The maintenance processing unit, whenever the first operation receiving unit receives the progress operation, causes the maintenance sequence to progress in stages. The first operation receiving unit is used in a common manner regardless of which of the plurality of maintenance modes is set as the default maintenance mode.

2. The gas chromatography apparatus according to claim 1, characterized in that, It also includes a notification processing unit, which is used to notify the progress status of the maintenance sequence.

3. The gas chromatography apparatus according to claim 1, characterized in that, The plurality of maintenance modes include a maintenance mode in which the gas supply is stopped upon receiving the progress operation by the first operation receiving unit, and a maintenance mode in which the gas supply is automatically stopped if the first operation receiving unit does not receive the progress operation.

4. The gas chromatography apparatus according to claim 1, characterized in that, Only one of the first operation receiving parts is provided in the housing.

5. The gas chromatography apparatus according to claim 1, characterized in that, It also includes a second operation receiving unit disposed in the housing, which accepts a cancellation operation for canceling the progress of the maintenance sequence.

6. The gas chromatography apparatus according to claim 5, characterized in that, When the cancellation operation is received by the second operation receiving unit during the progress of the maintenance sequence, the maintenance processing unit cancels the progress of the maintenance sequence. When the progress operation is subsequently received by the first operation receiving unit, the maintenance processing unit causes the maintenance sequence to start from the beginning.

7. The gas chromatography apparatus according to claim 6, characterized in that, The maintenance sequence includes a cooling process to cool the component. When the cancellation operation is received by the second operation receiving unit after the cooling process, the maintenance processing unit invalidates the cancellation operation.

8. The gas chromatography apparatus according to any one of claims 1 to 7, characterized in that, The component is a sample inlet, a column, or a detector.

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